Hi, I currently ride a Look 585 with TT 56cm and HT 156mm. I can get a mint 2011 Time RXRS in Large (TT 57.5, HT 185mm) at a great deal. Go for it?

From what I've read, bigger frames may offer more comfort in longer rides? So keep the 585 for shorter hillier rides and use RXRS for longer rides? Need your BF wisdom.

I'm 6', 32 in pants inseam, no spacers other than a tall cone spacer on the 585, 110 mm stem.

Thanks