The basic HW 19 table is a very well made, high performance platform. If it has been maintained properly (meaning nothing more than not abused), it should be fine for use with any of the top tonearms out on the market. I agree with millercarbon that it makes sense to buy a topnotch arm first, and then upgrade the table if you are not completely satisfied with that change.
Unfortunately, many of the better arms that could be had for reasonable money are no longer on the market, particularly after Jelco ceased operations (they were the OEM manufacturer for a number of brands, such as Ortofon). Origin Live offers a variety of arms at a pretty wide range of prices, and their arms are decent. At fairly dear prices, I like the Triplanar, Basis Vector, Kuzma 4-point, and SME V arms. Other top contenders include the Shroeder LT and Reed tonearms.
I have heard a Clearaudio table with the Universal arm, but not the Tracer arm. I liked this setup because I like poised, rich, and quiet sounding combinations (surface noise is well damped), but, others might find this sort of sound to be a little on the "dead" side (matter of taste).
Good luck on your search.