I'm in the process of abandoning my desktop and switching to laptop full time, and after weeks of figuring out the best laptop setup, I've come to the same conclusion - 13" MBP i5, 8GB, SSD = best of all worlds. Only left is to make sure I can dual boot some linux distro on it without issues (the HD3000 gfx drivers for linux may be an issue, but appear solved in Ubuntu 11.04).
X-25M. It's not the latest and greatest, but I got it for $170 after a sale and mail-in rebate.
If you've got more cash to spend, you may want to look at the new 310, or 510. There are other great SSD makers, but I chose Intel based on the price and general high reviews.
Wow, that's apparently a great deal on the X-25M--they were retailing for $220 at NewEgg.
I'm waiting to see what comes out in the next few months, as apparently OCZ and Intel are building drives with the new SandForce chipset. Don't know if the improvements will be significant, though...
I have a 24" monitor at my office, and a 27" iMac (my wife's) that I use as a second display for my MBP.
Best of both worlds. Speed, mobility, and big screens when I need 'em.