I'm a fan of the original Winchester 63's, and see them fairly often in handsome, used condition at local gun shows for $400 and under, sometimes as low as $325 in very respectable condition. Around here, the average yahoo pretty much just wants a gun he can put a scope on with no effort, and if an aftermarket bull barrel and plastic stock are available, so much the better!

I don't know what the projected price for the Taurus 63's is going to be, but you might want to scout around for a nice, used original Winchester 63 -- depending on the amount of finish wear you can accept, you might be surprised what you can find!! An 80 percent one with no abuse wouldn't be hard to locate here in my area for $350 with a little looking.
And boy, howdy, they are SWEET SHOOTERS. I have one my late gunsmith friend turned into a carbine for me, with a Lyman #45 receiver sight. He cut the barrel to 18", installed a factory-style rounded crown, re-dovetailed the barrel to factory specs, and mounted a nice old Lyman ivory bead front sight. It is short, light, handy, and deadly accurate! In case you're wondering, the short barrel doesn't seem to make the rifle look odd -- rather, it makes it look kind of like a scale model of the old Winchester .351SL model 1907. I was going to go with a 16.5" barrel for maximum compactness, but my 'smith talked me out of it, saying it would be too short and look out of balance, and I'm glad I listened to him -- 18" came out just right. The folks I've showed it to and let shoot it really love it, and seem to hit very well with it. Most think it came from the factory this way, thanks to the care my 'smith took to duplicate the original look of the Winchester factory crown and dovetail dimensions, etc. Plinking with this thing is addictive!!
If you're thinking about aftermarket or improved sights, I persoanlly prefer a receiver sight to a tang sight for a couple of reasons -- 1, they are more compact and less apt to hang up on stuff or get in the way; 2, they don't interfere with your natural grip on the rifle, and 3, if you use your rifle as a takedown for compact storage in traveling (I do), the front and rear sight will always be on the same plane if you use a receiver sight, and the zero doesn't change. The Lyman 45 is an extremely flat, compact sight, all steel and very well made, that was designed just for the Model 03 and 63, that can be located from the collector sight suppliers such as Nick Stroebel and Garry Fellers with some effort. It isn't cheap, but you buy once and use it for the rest of your life... well worth it for something that brings you happiness every time you see it for the next 50 years, in my book!
Hope this helps,
John