I have a G0555 and it's a reasonable saw. Sometimes I want for larger capacity, but I make the kind of stuff you do, and it's more than adequate for that. Gotta get a good blade and the Bandsaw Book. I'd get the riserblock with either this, the P or the X. This will solve the capacity issue.
Personally, I don't see the hype of the G0555X. The biggest improvement is the extra 0.5hp vs the 0555. The other bells and whistles just don't matter to me. If you were prepared to spend on the X, then look at the Polarbear 513. You get 2hp for close to the same price.
I also think a better investment than a planer at this point would be a plunge/fixed router for you. Make a table for it. With a plunge router and a spiral bit, you can do a lot of what a track saw can do. Plus, you'll be able to rig jigs to do tenons/dados and most of the things a tablesaw is good for.
If you really want a planer, look into the Ridgid and Steel City benchtop planers. The Steel City comes with a helical head and is on sale at a lot of places like Highland WW. The Ridgid planer - like its jointer cousin - is an excellent buy for what you can probably get it for between coupons and sales @ HD.