The synths in my recommendations have only been named, because they are very versatile … considering the versatility of the Virus, which had been used in the past.
Since you don’t look for vintage synths, what about the followin two:
- Novation MiniNova (which I would call a Virus for small budget… having both myself)
- Roland D-50 (second hand, should be quite below £500, it’s robust enough, to be in good shape for many years and may only need new battery)
As an example the D-50 has per voice:
- two tones (completely different synth sounds, layered or split)
- each tone consists of two partials, which are either a complete synth-voice, consisting of one virtual analogue oscillator, filter, and amplifier, or of a sample player voice
- each synth voice comes with 2 ENV and 3 LFO and some other modulation stuff …
- 100 factory samples with various transient sounds including some loops.
There is EQ, chorus, and reverb too …
The D-50 voice can be either four completely different synth-voices, or four completely different sample-voices, or any combination between … layered or split … it’s polyphonic, keyboard generates velocity and aftertouch … it took some time to get my head around the engine and interface, but it’s also one of the most versatile synths in my studio This machine screams to be programmed and to make sounds, which other classical synth concepts can’t deliver.
… it’s availabel also brand new … Roland D-05, should be below £400 …
BTW … I like your tracks and would say, the D-50 or D-05 sound would perfectly fit to this vibe