Component (YpbPr) to VGA Converter with xbox 1

I have a Component (YpbPr) to VGA Converter that I purhcased from monoprice item #7113 that I am using with the original Xbox and a Asus VH236H monitor. I have the M$ HD cable that I'm using through the VGA converter to convert component to VGA. I want to be able to display on this monitor the same resolution and frame rate that the Xbox 1 will display while playing Halo 1 on a CRT before I explore any other resolutions. I believe that Xbox 1 plays on a HD CRT using 480p in a 3:4 ratio and that the xbox should be set to normal mode rather than wide screen for that game.

The converter can do VGA Resolution at: 640x480; 800x600; 1024x768; 1440x900; 1400x1050, 1600x1200; 1680x1050; 1920x1200; 1280x768;

Component Video Resolution supported: 480i, 576i, 480p, 576p, 720p, 1080i, 1080p(50Hz/60Hz);

What's interesting is that there is a "wide" mode option for all of the above resolutions which stretches the image to the full screen of the monitor.

The VH236H monitor is a 23 Wide Screen 1080p with True Resolution: 1920X1080

What settings should I put the xbox 1 at, the conveter, and the monitor to mimic the lag free performance and resolution of the Sony 24" FD Trinitron WEGA TV, Model KV24FS120? I want to be able to play my xbox on my desk, rather than my CRT. Why would the converter not offer 1280x960?

I don't think my monitor can be set for 4:3. I have to pick a resolution on the converter so use 640x480? Doesn't let you chose 480p. I noticed that 1440x990 when selected says 480p @ 4:3 and there is black on the left and right sides, while all other resolutions don't result in a black left and right. When trying the highest resolutions my monitor came back with an "out of range error" btw. What causes that to occur?

I was able to adjust the monitor to 4:3 after putting it on the 640x480 setting. After doing it via your recommended method, even with the brightness all the way up, the image is still kind of dark. Monitor brightness and converter brightness is at 99. I tried using a standard component to VGA cable directly to my monitor, but it didn't work, hence the reason why I got this converter. Not sure if this monitor has sync on green or not. What equipment do I need to get around the fact that the XBox output 720x480 has to be reduced to 640x480 with vertical re-sizing? Is this x2vga2 converter seen below any different than what I have and would it be any better?

http://1n73r.net/2006/04/21/x2vga2-review

Also with my 360 hooked in though hdmi through the same monitor, what settings on the monitor and on the 360 do you recommend?

Thanks again for your responses.

I can't find any used x2vga2 for sale....

vd-z3 I heard doesn't look good on LCD and is no longer made
CSV-955A by datapro is suppose to be the replacement of the vd-z3, but I can't find a review on it for xbox on LCD

Would a Key Digital KD-VA5 look good on my monitor?

Thanks! So while the ones I listed are considered real transcoders, the ones you linked to will perform just as good as the x2vga2?

Thanks again for all your help! I'm going to buy what you suggested and return the one I bought back to monoprice. Once last question, on the 9A65 which of the 3 output settings would I use:

RGBHV -Separate H and V sync
RGBS -Composite sync on the H output
RGsB -Composite sync on green