cstamm81,
Since you've read through these forums and know what you are getting into, you should have a leg up on most people who buy these types of machines. It's likely you'll be able to avoid some potential problems since you'll be aware of them from the start. Being comfortable with routine maintenance and fixing small issues is a big plus too.
I was in pretty much the same boat as you 3 years ago: new home, several acres of brush and field, some slopes, drainage issues, etc. I purchased a 422 which worked out fine for me. Of course I would have liked the stronger wheel motors, but the 22hp has gotten most jobs done okay. I bought the 4 ft finish mower because of the smaller engine size, but it might be a good idea to get the smaller one with the 425 too. Don't know for sure, but if you do have to mow up slopes and the grass gets tallish it might be better to have the 4 ft deck vs the 5 ft. The wide turf tires do reasonably well in the soft areas where there is poor drainage. You still have to be careful, but I believe it does better than most machines could and has a strange ability to get unstuck due to the articulation (you'll figure it out the first time you get bogged down

). I also have the light material bucket, forks, mini-hoe, brush cutter, and 2" receiver attachments. The brush cutter works pretty well. I replaced the bolts with stronger ones and added some pieces of tire retread to the ones acting as blade stops. I keep a pile of mulch around as we continue to evolve our new home's landscaping. The LM bucket comes in very handy moving that stuff around. You can use it for dirt and rock, but probably shouldn't fill it all the way up or you'll get some buckling. Digging into the ground using the LM bucket (especially without teeth) is very difficult. The mini-hoe is great and I've dug a lot of trenches. It's all clay and rock around me so it's not always smooth going, but it will get it done eventually. Forks... well you just have to get the forks. That's what everyone here told me, I listened, and now I'm passing the advice on to you.
Overall, it is not a perfect tractor but it is the best I could do for any where near the money and I'm definitely glad I got it. It's a good combination of size, cost, capability and performance. If PT could do some minor redesign to address a few issues here and there, if would outstanding... but we all know PT doesn't care to read these forums and benefit from all the terrific feedback left by the smart guys who visit here. I know I'm glad I found this place before making my purchase.
Good luck!