Advice Needed: Speedmaster Professional 145.022 vs 3570.50

I am new to the forum, but I've been scouring them for a couple of weeks trying to learn as much as can, as I am in the market for a Speedmaster Professional (gift). (Also not sure if this should go in Vintage or Modern, so I'm taking a stab here.....)

I believe I have narrowed it down to the 145.022 or the 3575.50. Given my price range (I'd like to stay under $3k), I think I would be looking at later model 145.022s.

Is the main difference between the 861 and 1861 movements the rhodium? Other than the movements, are there other differences I should consider?

I am not the greatest "decider" in the world, so any advice I can get would be very much appreciated!

Do you want a watch that looks and feels brand new or are you looking for a vintage watch?

If new is your thing, you should be able to easily acquire a fairly recent Speedmaster with box and papers in like new condition for under $3,000.

If you prefer a vintage style watch, look for a 145.022 with the creamy yellow tritium patina that has been previously mentioned. You won't be able to get a step dial 145.022, but you should still be able to track down a nice later model with great patina in good condition for under $3,000. Ex. There was a nice one from 1991 I think that was for sale last week for $2,600. If you see a great example though, act fast, they tend to disappear quickly.