Just ordered first mech keyboard!-- Couple questions

Quickfire Rapid w/Reds.
Going from a rubber dome Razer Anansi.

I ordered it for like $100 shipped and then a $7 shipped USB keypad/numpad on TigerDirect for when I need to crunch numbers, I can just take it out and put it to the left of my keyboard or right of my mousepad.

I bit the bullet and despite being a poor high school student figured the amount of time I spend on my PC is worth the investment.

Should I order some o-rings for it too? I want it to be as quiet as possible and being as I have Red linear switches a lower travel distance wouldn't hurt, I don't need my linear switch to go all the way down.

Where can I get some quality o-rings for a mech keyboard? The ones on WASD Keyboards are so expensive. Like $26 shipped with the key remover, kind of ridiculous.

Anyway did I make the right choice buying this mechanical? I've been doing tons of research and it seems like the best fit for me. Besides I have a USB numpad ordered for if and when I ever would need one.

I'm so excited! I hope it's better than my Razer Anansi, despite having no backlighting and losing the macro functionality: I didn't ever really use it anyway to be honest.

**The biggest thing I'm worried about with such an expensive keyboard is my oils and what-not from my fingers accumulating on the keys. It does that now on my current keyboard but I usually wipe it off every couple days with a very damp cloth or a tiny amount of rubbing alcohol or something. Can I still do this with the mech keyboard? What's the best way to keep the keys clean from the buildup, and stay as new as possible?

Thanks man!

Do they have the 40A orings at local hardware stores though?

What would be the difference in performance between 40A and 50A? I read that thread you linked, and everything I've read tells me that 50A is harder but what does that do in terms of sound reduction?

Thanks all for the replies! I did end up ordering some o-rings from WASD that I'm going to try out, and if they don't work it isn't the end of the world. Uh I can't wait to have a mech keyboard after all this time and how often I use my PC.

Oh one other thing, is the plastic keycap remover that comes with the keyboard fine or do I need to get one of those wire ones for big keys like the spacebar? (How do you even remove the spacebar?) Thanks in advance.