I haven't really ever seen a light bar on a Jeep, besides an overhead rack with lights. Mount up what you got. If you do what you're trying to do, then you will get a lot of glare off of the hood, which will make it difficult to see.
Just a pair of those spotlights are more than good enough for offroading at night. I have a pair mounted on my front bumper.
Also, those lights are only going to draw about 8.8-9 amps a piece with the system at full voltage. So you're looking at about 18 amps max for both. At a certain point you will need dual batteries and a higher output alternator. don't know at which point though.