haha, My machine is a work in progress!
I was originally going to cannibalize my x-arcade, which has knock-off happs buttons and knock-off happs supers. I LOVE those joysticks, They are beefy, and rugged and feel like the sticks I grew up with.
Then, I decided I was going to switch to lit up buttons. Gameex, the front end I am using, has a plug-in that lets you light up only the buttons you use for a particular game, which I though would make my cab much more user friendly. Buttons are easy to shop for, because they are cheap! If you are trying to decide between different buttons, just order one of each type and try them out, after you figure out which one you want, then order a bunch! Anyhow, I wanted lit up buttons, and I saw the paradise arcade buttons with the chrome bezel, and thought they looked cool, so I ordered some and swapped out the standard microswitch for their softer, 20g micro, and I liked them so much I stopped looking and just went with them. I like them, and my bro in law, who is not a gamer at all, commented on how nice he thought they felt.
I just got the sticks recently. I wasn't sure if I wanted them, but a forum member was getting rid of a pair on here cheap, so I figured I would give them a shot. Its a Japanese style joystick. A ton of people on here rave about Sanwa and Seimitsu sticks, but I don't like them, they feel too dainty for me. Well, to my surprise, the paradise arcade stick is actually pretty solid feeling. i like it. Its got a nice smooth action, and it has just the right resistance and centers perfectly.
Like I said, I haven't finished my project, and so, I haven't tried these out with actual games yet, but I think I will like them very much.
The thing is though, like I said, so much about arcades is about personal taste. In my opinion, there is not really a right answer to "what is best" it all depends on what you grew up playing and what type of games you like.
I would suggest you just order one button of each of the types you are thinking about installing them, they are like 1 or 2 bucks each, that way you can try for yourself and see what feels best.
As for joysticks, I know paradise arcade carries IL sticks, which are the same as the happs, they have a super and a competition. If you ordered the LED sticks and hated them, I am pretty sure Bryan would let you return them and you could get the IL sticks, they are cheaper than the bases for the happs and the competition on that other site, so it would be no money out of your pocket.
I think that is what I would do if I were in your shoes.