Couple things come to mind after reading the thread:
1: Do not use boiling water or windex to clean your gun. Its unnecessary and exposes the wood to moisture which could mar the finish and cause rust if you are not super careful about getting all the water out/off AND letting the wood dry before you reassemble it. Hoppes #9 (or similar) is all you need to clean the metal on your rifle, regardless of how many rounds of corrosive primed ammo you burn through. You linked an article on 7.62x54r.net, read it, and go back through the posts on their forums. Lots of good info there.
2: Cosmoline removal - don't dunk your rifle in hot water, for the same reasons stated above. There are other, less risky, methods for getting the cosmoline out of your rifle. Don't disassemble it and stick it in a low (150 degree) temp oven. It makes a mess, stinks up the house, and your wife/girlfriend/significant other will not be happy. Other than that it works pretty well if you have to de-cosmoline your rifle over cooler months. The best method I've heard/used is to put it in a sealed black garbage bag on a nice warm summer day. Don't expect, or even try to get all the cosmoline out in one session. I've had 6 sessions with my M44 and I STILL have cosmoline seeping out on summer range trips.
3: Do go to Wal-Mart, or your local gun shop and pick up a recoil pad. Using a recoil pad makes you no less of a man. Of course, I DO recommend shooting a few rounds without the recoil pad first, just so you remember why you bought the recoil pad.
4: Do not expect accuracy. Do not expect a "shot group". Expect a "pattern". If at 100 yards you can get a 5 shot group of 6 inches, be thankful. Try to do better, but remember in many cases you are shooting a gun that has had inexperienced conscripts maintaining your rifle and its barrel/rifling. If you luck into one of the ones that can pull off tight groups, your expectations will be met and exceed.
5: If your final decision is a Mosin-Nagant, see about getting an M44, the slightly higher price is more than made up from the enjoyment of the fireball at dusk/night.