I was an early adopter of the first gen 8 gig ipod touch and have now run into the problem that everyone warned me would come up...I'm out of space. My question is this..I can sell my current ipod for $150 and a retailer has the first gen 16 gig touch for $220. Is the second gen worth the extra 80 bucks? Other than external volume control and speaker...is it any better than the first gen? Faster processor or anything? Thanks much.