Regarding the quality you can easily upgrade your cartridge to another MM like Stanton CS-100 WOS, Audio-Technica AT-ML170, Grace LEVEL II ... and the difference can be huge on your Rega arm!
But within $2k you can always buy absolutely fantastic vintage tonearms such as Technics EPA-100, Fidelity-Research FR-64fx, on the cheaper side something like Lustre GST-801 ... It is impossible that any of these arms can be beaten by Jelco, Origin Live, Rega and many modern tonearms.
If you want something special among the new ones look for a short Reed 3P
P.S. I think the weak point is your cartridge, probably it is more important to change it first.
But within $2k you can always buy absolutely fantastic vintage tonearms such as Technics EPA-100, Fidelity-Research FR-64fx, on the cheaper side something like Lustre GST-801 ... It is impossible that any of these arms can be beaten by Jelco, Origin Live, Rega and many modern tonearms.
If you want something special among the new ones look for a short Reed 3P
P.S. I think the weak point is your cartridge, probably it is more important to change it first.