I dont mean to toot my own horn but I know quite a bit about LCD monitors.
I will help as much as I can, unfort. not too many on these forums ask many questions about them.
That Sceptre you listed up there is cheap for a reason, it uses a cheap panel and doesnt have the greatest contrast between colors.
Also, please note that 22" monitors are relatively new to the market.
I would suggest either going for a 20" or 24" monitor since not many games support the 22" and they become stretched.
Now here are some important things to look at monitors for gaming:
1. Response Time - Def the most important feature - you dont want to see ghosting
Things you might want to look for:
1. Panel Used - There are 2 types of panels out there. A 6 bit panel and 8 bit panels. Pretty much what this means is that the 6 bit panel has 16.2 million colors and the 8 bit panels (or panels that use 6 bit w/ dithering) 16.7 million colors. Please note that most panels with 16.7 million colors use 6 bit panels + dithering which are just as good as 8 bit panels. ANd I have seen both 16.2 million color panels and 16.7 million color panels side by side and there is a BIG difference in the colors and the brightnesses of the colors. If you can I suggest you go with a 16.7 million color panel.
2. Contrast Ratio: This tells you how well the colors show up on the screen. The higher the ratio the better (such as 1000:1 is better than 600:1)
3. Size of LCD
Anyways as for brands I recommend Dell, Viewsonic, LG and Acer.
They make very good LCDs.
I myself own a 20.1" Dell, 20.1" Viewsonic and a 17" Sony (If you want to see the exact models than please look at my specs).
I must say I game a lot (games like CS:S, WC3, Doom3, FEAR, etc) and I do not see any ghosting with any of these monitors.
However, I must say the best one of all is def the Viewsonic.
Yes I had to RMA my Viewsonic once, but every since they fixed it it has been great.
The reason I like the Viewsonic the best is bc it looks great overall (not plain like the Dell) and it has more intervals with brightness, color ratios, etc.
However, I must say Dell has the best warranty overall (a zero dead pixel warranty which rox).
If you need anymore help please let me know.