upgrade the system that's easier and CHEAPER for you. Reason 5 upwards works better with a quad core 64 bit. yes yees it will run far more smoothly thanb any other program out there but most softwares are going the 64-bit route now.
So, either get a new mac (your bank account will get raped) or spend some quality time looking for a pc that is uber POWER at prolly 1/4 of the price of a mac....
in the end, its your preference that matters.
i could send you some links for powerful pc's...at peanut prices?
Reason 6.5.3, Windows 8 core 2 quad 2,33ghz, 2,34ghz, M-Audio AxiomPro49; Behringer BFC Mixer; KORG padKONTROL, ESI 1010e
"Life is like a Rhythm; Flow with it and you'll be Fine" - Sid Mercutio 1979 - ?