If you want crossover to a new unit I don't see any reason not to buy one but
Why not just stick with the SF2? What don't you like about it?
Don't get me wrong at all, I really like the SF2. I just dpn't really have any experience with other units so therefore I assumed my knowledge would be quite narrow. I don't want to make the mistake many have told me of to buy your own unit before you've tried others. So I just wanted to hear advice from others!