If I had the pick the perfect tow vehicle I would pick the GMC or Chevy Duramax Diesel pickup with All Wheel Steering and a extra cab or crew cab even. This combination is not yet available. You can get it with an 8 cylinder 6L gas engine. The Hummer H2 would be good too if it had the Duramax. My wife would not let me get a big V8 pickup or SUV that gets only 9 city and 13 hwy MPG, the Duramax would get the MPG up high enough (my guess 15MPG towing the Mac26X, 16+ city 20+ hwy) to make her happy.
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I am very pleased with my present tow vehicle (11.2 MPG towing Mac26X 16-17 city 18-20hwy MPG). An Isuzu Trooper-S 1995 with 130K miles and going strong. The engine is 6cyl 175hp, I added http://www.directhits.com to get better towing performance. The Trooper has a very tight suspension in the rear, look under one and you can see the leverage that the extremely long control arms have. I also added (only $65 each, installs in an hour) progressive rate rear coil springs made by OldManEmu down in Austrailia where the Trooper is a Jackaroo and it is known for heavy duty off road use. Other than that and OME shocks my Trooper is stock. I have had no sway problems even when oncoming trucks pass cloase by. The 1995 Trooper weighs around 4250 lb. dry. I think the very well controlled suspension makes my Trooper tow better than much heavier vehicles with sloppy suspensions. The engine and manual transmission are very sturdy units and are ready to tow as is, no extra coolers etc.. And 1995 Troopers are probably available for less than $9000. If you want neww, this is a bargain year for Isuzu Troopers 2002 is the last year the Trooper will be offered in the USA. The closeouts are great deals $7000 to $9000 below MSRP (be sure to get the 4wd model to make getting up the ramp really easy and to make owning a Trooper that much more fun.). The 2002 Troopers have much more power than my 1995 and they have grade logic transmissions which means they will automatically downshift to maintain speed down hill. Isuzu Trooper is the best value available for towing the Mac26X. Troopers are very big inside (90.2 cubic feet) and can handle a third row seat for three or fold the seats and put in the 18.5 cubic foot refridgerator and still be able to close the doors. On the outside the Trooper takes about the same parking space as a Toyota Camry, small enough and very peppy for fun driving on the commute or to bring the kids and their friends to events. Trooper seats are the firm suportive type that feel good for long drives and keep you in control when driving agressively, they are not deep cushy "luxery" "sofa on wheels" seats My kids and their friends ask to ride in the Trooper when there is more than one vehicle to ride in. Even Consumer Reports the magazine proven in court to have lied intentionally calling their the Trooper -rollover publicity stunt a fair test will tell you that the Trooper is way ahead of every other similar sized SUV in reliability. Expect well over 200K miles with few probelms, not even rattles as long as you do the maintenance.
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Sorry to go on and on. The only thing wrong with the Trooper is that it is not American made (The factory in in Japan). But it is American to get the best quality for your money and that is the Trooper, expecailly this year.