EasySocial is compatible with all Frameworks, when they advertise that it is EasySocial compatible, often they are referring to having either done overrides to EasySocial to style it differently... or they have designed the template and modules in a way that looks good with EasySocial. Don't be afraid of buying a template that does not advertise EasySocial support. If by some odd or rare occasion there is any incompatibility I am sure that Mark and the Stackideas team will provide swift support to solve the problem.
I have definitely tested YooThemes Warp framework, and it is one of my favorite. Out of the ones I have tested (JoomlArt, RocketTheme, YooTheme, GavickPro, JSN and JoomlaBamboo) I can comfortably say that it is not just one of the easiest to install and setup, but one of the fastest loading. I am strongly considering using a YooTheme template for my next site, just waiting to see what the community here thinks of the different alternatives first.
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Below is a slightly more elaborate version of the reply I did in your thread earlier, ketab. Not much added, just thought it would be relevant to the discussion.
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Here is how I would compare them based on my experience so far, but note I haven't done any stress testing, and coding is not my strong suit, so I can only speak on how it felt, which is why I am seeking advice from more experienced people in this community:
JoomlArt (T3): By far one of the most respected, they are continuously trying to implement the latest web technologies. This is great, but it can sometimes result in templates being challenging to configure. If you choose a template with very unique features or animations, make sure you use the Quickstart and read the documentation, as they really have used out of the box thinking to make their themes do wonderful things, but often at the cost of simplicity.
RocketTheme (Gantry): By far the most feature rich and easy to configure templates, but some would argue that they can be a bit bloated... and I am not a fan of their latest designs.
YooTheme (Warp): Arguably some of the nicest designs out there for Joomla and easier to configure than Joomlart, but a bit more complicated than RocketTheme. In many ways one of my favorites. Feels lighter and faster when compared to Gantry and T3.
GavickPro (Gavern): GavickPro has very well planned out templates and they are also a joy to configure. Better 3rd party component integrations than the rest, they put more effort into it I feel. Seems like a good balance between light and flexible, feels faster than Gantry, probably between Warp and T3 speed wise, but again haven't tested this theory.
JoomlaBamboo (Zen): Their templates are stylistically absolutely stunning, but they are less universal than the others.
JSN: I find them inconsistent... that said, they do focus a lot on third party integrations which I really really appreciate... for example they have the only nice looking Ohana supporting template on the market, and they were one of the first to attempt to make a template which revolved around EasySocial. I love their business model however, as they provide limited versions of their templates for free, so you can test before you buy.
If you are feeling adventurous, goto Themeforest.net then go the the Joomla section under CMS. There you will find very unique designs from smaller design firms or even individuals... consider it more of a marketplace than a template provider. There is always amazing stuff there!