Noob to MSX, Which System should i get? (MSX, MSX2/Brand Etc..)

Interesting! i read somewhere that Scart is better than American video ports, i was going to assume that it would decrease at least a little.

There are a number of region locked games. E.g. the PAL version of Metal Gear doesn't work on a Japanese MSX and vice versa. Most games are completely region free though.

On a side note: even if you already own Metal Gear on NES/Famicom, you may still want to play the MSX version. It's the original one and it's objectively the superior version. If you don't feel like forking out the kind of money people want for it nowadays (understandable), get Metal Gear Solid 3: Subsistence on PS2 or any of the compilations on PS3/PSVita/... that include that game. It has emulated versions on a separate disc of both Metal Gear and a localized version of Metal Gear 2. The NES version is just... meh. Even Kojima called it 'kusoge'.

Also many MSX ports of games have unique features that you won't find on other systems. E.g. Salamander (aka Life Force), Contra or Vampire Killer (Castlevania) play quite differently from their NES namesakes. And in Ganbare Goemon (aka Mystical Ninja in the US) for example there are 2 playable characters in the MSX release. The first Final Fantasy on MSX has completely rearranged music and a somewhat different colour palette compared to other versions. So don't necessarily assume that you "know" these games already.

The biggest exclusive is probably Space Manbow. It was only ported to the Japanese Wii Virtual Console and to some mobile phone format at some point. Very pricey game though.

SCART carries an RGB signal which gives the best image quality, far superior to composite video and also better than S-Video. Also RGB monitors and TVs often don’t care about 50 Hz (PAL) or 60 Hz (NTSC) which is good for playing Japanese games. Most if not all MSX2 and higher computers have RGB output (SCART for European computers, DIN plugs for Japanese). It’s meant for TVs and RGB monitors though, to connect to a VGA monitor you need a scandoubler. I connect via the SCART input on my TV, but outside of Europe those are not so easy to find I think.

On games, I can really recommend Metal Gear 2 for MSX, it’s a fantastic game and was not released on any other system (well, not counting MGS3 Subsistence for PS2). I’m also a big fan of the Japanese RPGs for MSX, SD Snatcher, Ys, Xak, Fray, Dragon Slayer 6, etc.

Also, you can of course try out any hardware or software you might want to buy in an emulator, as long it's emulated (and a lot is).

I see. I assumed it worked both ways. Found out "the hard way" when I got a Japanese copy of the game that didn't work on my Euro MSX. I have a Japanese MSX now too though. (And a European copy of Metal Gear, but I hadn't really tested it on my Japanese MSX since I assumed it wouldn't work anyway.)