Look for something with a Class D DSC (not the SC-101)...the class D is a full separate receiver in the radio that monitors channel 70. Also, look for one that will input AND output NMEA info so you can send position info to your new plotter and have it show up on the screen.
I have an ICOM 304 right now but it won't send position info...for that reason its going to go away and be replaced by a Ray49 (a steal at $95 from Bethel Marine). Alternatively you could go with the new Std Horizon Eclipse + (about $120 or so).
As far as the antenna is concerned, the Digital 529 or Shakespeare 5225 are both good. I happen to also like the West Marine 8900 which is made by Shakespeare and is a clone of the 5225 FLT. It lists for about $160, but as you know they send coupons, etc...all the time. The last time I bought one it was about $125 or so, and it comes with the solderless gold centerpin connector.