I would love to have a C300 Messenger TI...great ball!
Pro shop operator can make great suggestions after watching you bowl based on speed, revs, release style, and lane conditions.
The lane conditions/oil that they put out there has changed quite a bit over the last decade. Hard to say how modern bowling balls will compare in terms of reaction with your Messenger TI on modern lane conditions.
However, I think you have the right idea considering bowling balls with pearl coverstocks in the lower price range (since they tend to hook less). These days, the coverstocks have become so aggressive that a lot of pearl coverstocks can be used for medium-heavy and heavy oil. I would encourage you to also check out hybrid covers (get the best of both worlds of pearl and solid, and very versatile) and urethane coverstocks. The latter have been making quite the comeback recently and many bowlers double it as a dry lane ball and also as their spare ball.
Many many options out there...and the internet has a wealth of knowledge with comparison videos on YouTube and reviews from this site too.