As an Asus P5QL-EM motherboard (almost the same as yours) owner, I hardly ever used the onboard Intel graphics. I do like the Intel chipsets, these have proved to be very reliable in my experience. Except for the Intel graphics part. So I always used an ATI Radeon HD 4670 card (from Sapphire) with it. Excellent combination for as long as it lasted.
Lately I got an AMD Radeon HD 6450 (from XFX) to ride out what time is left on the motherboard. Here in Paraguay, you can get that card new for around 55 US dollars. So in the US they are even cheaper (I didn't look it up, but US prices usually hover around 70% of the Paraguay prices). Although the specs from that card appear to be good for the price, it isn't a good card for multi-monitor setups.
The drivers from AMD work fine with a single monitor. But they are problematic with dual monitor support on Windows 7 and a real nightmare with Windows 2012 (used their Catalyst 13.x, 14.x and 15.x range of drivers, including the beta's). Reporting my experiences to their tech support was met with utter silence from their end.
All I want to say is that a replacement video card won't break the bank (especially if you don't have a multi-monitor setup). You will like the extra options and power that even the "bottom of the barrel" cards from AMD or NVidia give to your old system and Intel graphics.