If you like the sound, I think the natural progression would be the IQ2 or 3 if you could find one used to keep it <$500. When I owned the TT2 I first auditioned the IQ1 and 2 and ended up with the 3. Each step gives you what you are looking for in fullness. The bass is going to be tough with the TT1 or 2 and something you're giving up to get liveliness of the table.
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