DrTrust:
IMHO, you already have more than enough computer to do what you wish. If the idea is to have two computers available, I'd suggest an Athlon 1.2 or higher, just to drop your compile time whilst programming; and I'd suggest a Matrox G-450 vid card, which doesn't have the blazing speed of a GeForce, but is fantastic with text and 2-D objects. If you view a lot of text, your eyes will thank you 😉
Frankly, I don't know if there is an advantage to using an LCD-specific vid card. I recommend iiyama monitors, which all use a standard D-sub 15pin VGA connector and will run well off any vid card. I suppose if the monitor in which you are interested has just the 24pin connector available, you'd have to go with an LCD-specific vid card...
For a laptop, I'd recommend the Compaq Presario 1200 Athlon 4 system. It's the most powerful laptop you can buy, at any price! You can order direct from Compaq at prices starting at $1249.00 (this is cheap Pentium III territory), and get a nicely appointed one for ~$1700. I'd recommend Compaq's 30Gb HD upgrade, but only 128Mb of RAM (it's >$100 cheaper to buy a 256Mb piece from Crucial and upgrade to 320Mb yourself, and you can then sell the 64Mb piece you remove on E*gay to make the cost even less!)
If you don't like Compaqs (I don't, particularly, but the above is my laptop of choice), NEC, HP and, I think Sony, are releasing Athlon 4 lappys in the near future...