different perspective...
personally, I go 180 from isotope. I say DONT get a new bike. If you quite simply want a new bike, say you want a new bike and get it. But if you're looking for an excuse for a shiny new bike, or 'stylish' trackends, don't use the slippin' wheel 'scuse. Dont know what your prob is, but it aint in the dropouts. There's a cheaper solution, I'm sure.
IMO, dented 'ol kluged together bikes have a lot more character than the ubiqituous moderns being snatched up by the poseurs. Not to mention, when you drop racerboy, no-ones gonna mistake ability with equipment.