It is indeed hard to say whether a Basik Plus would be a big enough upgrade from the stock arm to be worth the trouble. The MP-200 shouldn't make outrageous demands on the arm into which it's fitted.
When AR's The Turntable first came out, I can remember one reviewer tested it with an Ittok, so it was clearly deemed worthy of higher-quality arms at the time.
Alternative Linn-style arms to consider: the Alphason range (preferably an HR-100S if you can find an affordable one), or perhaps a Helius Scorpio or a Linn-pattern Mission arm (the 774SM, not the cheapie 774LC, as that's very similar to the AR arm). A second-hand Akito in good condition would be another possibility. However, a lot of these arms would be much more difficult to find than a Basik Plus.
The implication is that your budget wouldn't cover a new arm, but if this is a possibility, the Jelco 370 or 250ST would be the obvious choices.