The Bosch 1617 is highly recommended for table use, in part because its fixed base can be mounted under the table with an above table height adjustment. Here's a picture.
Personally, I still use the 1617 freehand and plunge, but put a Triton TRA001 3 1/4 hp in my table. The Triton was made for under table use, and is set up with a crank so you can set height precisely. It also has a safety lock you have to press before you use it. It cranks up very high above the table for easy bit changes. It costs about the same as a lift alone.
If the Ryobi doesn't allow you to convert it to a table model, I'd keep it for freehand use, and seriously consider going for a Triton. You're wise to go for a table mount either way, it's much safer to use a table than freehand, and using larger bits freehand doesn't work well and is pretty risky.
Be sure to download and read the pdfs Stick put up. They cover a lot of territory. Also, you might get a lot from watching videos by Marc Sommerfeld. He sells router related gear, but he started out making cabinets, so his technique is really good and worth learning.
Don't know if you have a commercial table yet, but you might consider making your own. Can be as simple as a chunk of flat ply or as complicated as a fancy cabinet with drawers. Search the Forums for threads on making a router table for details. You'll want to add a mounting plate to your shop made table, Kreg and many other companies make them, often pre-drilled for your router model.
BTW, welcome. As you can tell, there's a ton of experience around here and we love to answer questions. You might also like to read this pdf on the 17 things that really accelerated my learning curve. It also contains suggestions on shop purchases and hopefully will help you avoid mis-spending on tools and accessories.