Bosch is good.
On my boats the heavy work is done with a Dewalt angle grinder, but for most of the wood/fiberglass/paint jobs I go to my Bosch random orbit sander (#3727DVS). It is a great tool with variable speed and easy to change (velcro) abrasives for fine through heavy work. I'd be lost without it. The one thing that I might change is to go with the 5" model, since 6" sanding discs are nearly impossible to find locally.As for polishing, ah, I haven't quite gotten to that point yet as everything seems to always be a work in progress.Even if you don't buy your tools from them, I find Amazon.com to be a great resource for information about things to buy. The customer reviews are very inciteful and they also indicate other items that may be comparable or better than that which you are looking at.I buy most of my tools online from Seven Corners Hardware (see link). They started out as a neighbourhood hardware store in St. Paul (I used to live there) and have now branched out to the internet. They have great customer service with knowledgeable help, great prices, and I've always received free shipping.(In the interest of full disclosure, I must admit that I make my living selling through Amazon's interface.)