Sure, you are welcome. Well, its for budget, but in many cases, yes, the old school stuff is superior to quite a bit of the new stuff that is out today. There is, of course, some new stuff out that is good too, but it's not as common, you have to know specifically what to stay away from, and it can get pricey in a hurry.
I'm a Linear Power guy. Their new stuff is outstanding, maybe the best in the business, but not within your budget. The good news is their old stuff is VERY good, extremely reliable, and you could certainly find some in your budget. For example, a LP952, which is 47.5 watts by 2 channels, can usually be had for around $150-$200. Don't let that power figure fool you. I've used one to drive a robust 6.5" component set and it did so very well. (In most cases, the figures you see on today's amps of 1000W, 5000W, etc. are way overrated, and even if not, are not rated by the same specs as the quality old stuff was) The old Linear's can still be worked on and fixed today, and in most cases, can be modded to provide even more sound quality. I am fortunate enough to be friends with the people that own the company, and can certainly vouch for their quality and integrity.
If Linear is not what you would like, there is still some very nice old school stuff to be had. I would look at the Hifonics VII or VIII series, PPI Art series, or Rockford Fosgate Punch 45, 75, and/or 150.
As far as speakers go, there is certainly some current stuff out today that is pretty good quality. For starters you could check out Crutchfield online and see what they have to offer. You are not going to get rock bottom prices there, but their service and tech support is very good. I've done business with them for 20 years and have never had a problem. Some of the Infinity component sets are pretty good and won't break the bank. Focal is loved by many, although I have never used them. However, they get up there in price rather quickly.
An old school company that's still making speakers today is Image Dynamics. You can find them on the web. They had a rep back in the day of making a high quality product. I'm not sure how their products today compare, but I do know they are still around.
Whether it's old school or new, I believe most of the 3/4" or 1" tweeters should fit in the stock 460 locations. I used to have a '94 vert with the 460 system and if I remember correctly there's quite a bit of space there.
Please let me know if I can help any further.