First of all I think 4wd is a must have in a tractor. There are times, especially when using the FEL, that 4wd makes a difference. We have been having LOTS of rain over the last couple of months. There is a ditch, that eventually I'll put a culvert in, that has a steep approach and exit. When its real wet I'll just start to get wheel spin in 2WD. I think it would be real hard to get the tractor stuck on my property in 2WD. BUT, having 4wd it makes it an even less likely event. Beside FEL work, some of the pulling I have done has been greatly helped with 4WD.
He is giving you a great deal on the 5105. I was qouted 21,000 for a 5105 MFWD amd 22,000 or there abouts for the 5205 MFWD. There was some rebates involved in the pricing so take it with a grain of salt and that might include some a third SCV and power beyond kit. I felt at the time the salesman was trying to edge me to the 4000 and out of the 5000s. If it had not been for the backhoe I would have leaned heavily towards the 5205.
The HST only costs you 1.5 HP on the 4700. I don't like HST since I want the tractor tranny to work as closely as possible as my truck manual tranny. There are several threads running around TBN of people getting off the tractor after a long day and reaching for the turn indicator to put the truck in foward gear or trying to get the accelerator peddle to act like the HST. I would rather reach for the turn signal than mess around with my muscle memory involving the accelerator peddle. But this is highly subjective.
I do enough loader work where I could see having an HST might be slight improvement over the PowerReverser. Even though I don't need to I ALWAYS clutch the tractor when changing from forward to reverse. I can't stop my left leg from doing the shift. Its just to ingrained! /w3tcompact/icons/smile.gif
And so far I don't think I have been limited by the HP on the tractor. So I would not worry about 1.5 HP if you really want HST. I have had problems with traction but NOT HP.
I wanted at least 40 PTO HP since I want to run a generator set and possibly a
chipper down the road. I also wanted a heavier tractor. The 4700 was the tractor for me but like I have said the 5n05s and even the 5210 was attracting my attention.... /w3tcompact/icons/smile.gif
If you have to pick up any trees/brush I would seriously look into a 4n1 bucket. They are simply awesome and I can't believe how usefull it is...
Later...
Dan McCarty