I agree with Steve (may I say again). If you don't need a loader, then the 749 will do just the same work as the 1 series. There's really not much difference. Plus with the X7's you can get all wheel steer. As far as pulling a 3PH implement, I'd bet the 749 would stand it's ground all day against a 1 series tractor.
As for what you actually need, I don't think you need over a x500, though you can want. Your system falls right into what Deere marketing wants, though. You look at the x5's, think an x7 would be nice, but not much difference between that and the 1023E, but then realize how much nicer the 1026R is, to realize for that much you can almost have a 2320, but you don't want to short change yourself on power so your looking at a 2720, but that is almost the same as the 3320, but then you see those cabs on the 3x20's and you've got to have one of those, so you say to add a Schulte 42' batwing to that 9560R and we got ourselves a deal. I think you get my point. I think this commercial sums it up pretty well: Point being, just keep it in perspective of what you actually NEED and what you WANT. Not that getting more than you need is bad, I've done it quite often, but you would be plenty happy with either the x500 or x700 series.
[ame=http://www.youtube.com/watch?v=bCVH7XK6ktk&feature=results_main&playnext=1&list=PL89E098DFF13F68EA]Funny John Deere Commercial - YouTube[/ame]