Nice Marquee, much better than the previous.
The transparent Mame logo on your sideart is a little disturbing.
My original idea would be using a TV through scart/euroconnector. I have read somewhere that you would get an almost perfect image quality and resolutions with this combination... now I'm confused
There is no problem using a TV for your arcade cabinet. As you say you wish to use a scart-tv. That is an excellent choice if you want to use real arcade resolutions.
A few advices/warnings for you when selecting/using a scart tv:
You have to adjust the overscan on your TV. This is done in a special service menu that is not useraccesible and can be hard to find.
On some new TVs the horizontal size is fixed in the hardware and cannot be adjusted even in the service menu. You actually have to replace parts inside the TV (a coil) to change the horizontal size. NOT recommended. (Please do not open your TV because I