Tom, I really think you need to get out and visit a few layouts before you make a decision to buy more track or switches. You can't go wrong with either Atlas or Ross, but each comes with a trade-off, and it would be good to be sure of your choice. Your profile doesn't indicate where you live, but getting to visit a few home and club layouts, taking a really good, close, look at their track and talking with them about what they like and don't like about it, would probably help you quite a bit. If there are any train shows within a day's drive of where you live, maybe you ought to attend one. Usually there are some modelers in the area of any good sized train show, who invite visitors in connection with the show. There's usually a list of them available at the show.
Personally, I chose Atlas track and switches and Brennan's Better Ballast for one reason -- realism -- and got the result I wanted. The track was all painted prior to being laid. The switches are all operated by Tortoise switch machines under the table, and they have been satisfactory. They have needed a little bit of maintenance in the 14 years they have been in place, but mainly just periodic adjustment, or ballast getting caught in the points. Probably Ross switches would have needed no maintenance at all, ever.
Sometimes I wonder how it might have been different if I had used Ross track and switches. Probably would have always looked at those bigger ties and wondered what it would have been like with Atlas. But I imagine that I would never have had to maintain anything in the track.
I have a lot of Atlas/Custom Signals block signals, and they are excellent and work like prototype signals. They added a couple of thousand dollars to the cost of the layout. My trains would have run just fine without block signals, but I desire realism and was willing to pay extra for it. If all you want signals for is just to show which way a switch is lined, the Z-Stuff signals can do that and they look good. The Z-Stuff semaphore operates slowly and can be a switch indicator, or daisy chained to other signals for realistic operation, or operated on a timer to go red when a train passes them and then return to yellow, and then green, using a built-in timer.
I also bought a bunch of Weaver line side poles, as I wanted to have a 4-crossarm pole line, but that was where I drew the line at realism vs practicality. I would probably have never been able to climb onto the top of my layout without damaging the pole line, and did not install the poles.