I'm expecting a pickup of about 2/3 in NY with 2 more in NV.
Gross or net? New York is losing 2 seats. Downstate Democrats will lose one seat for sure when the new map is drawn. Upstate Republicans will likely lose the other seat. That leaves you with 6 Republicans - King in NY-03, Grimm in NY-13, Hayworth in NY-19, Gibson in NY-20, and two of Hanna in NY-24, Buerkle in NY-25 and Reed in NY-29. (It would 7 Republicans if Corwin wins the NY-26 special election. - 7 out of 27 post-redistricting seats)
Which 2 or 3 of those 6 or 7 are Republicans going to lose in 2012? New York State Senate Republicans will try their hardest to shore up the districts held with Republican voters, which shouldn't be too hard since they only have 6 or 7 seats to shore up, and all but NY-25 are traditionally Republican districts with R+ PVIs.
New York Republicans are not overstretched. If anything, the 2010 election reverted representation back to the norm. 2006 and 2008 were the aberrations.