pinball is tough with a tv...
unlike MAME, you *want* high-res when you're playing pinball. you want the table to be as crystal clear as possible. thus, IMO, pinball looks best on a computer monitor. it's a lot harder to make stuff out on the tables on a tv screen.
that said, don't let it stop you from putting your pinball buttons in. i plan on doing the same, with a 27-inch tv.. maybe one day i'll have a tv cab and a monitor cab, but MAME is my #1 priority right now, and PINMAME is strictly secondary..