Well, the SSE-BASE-128SJ is optimised for 118-138MHz. So, if you're only listening to civilian aircraft, then it's fine. However, if you listen to both civilian and military aircraft, then you'd need:
1. SSE-BASE-128SJ @ £77
2. SSE-BASE-125SJ @ £75
3. SSE-DIP2002 AB-EU @ £45.50
Total cost = £197.50, which was out of my price range.
I'm still researching into whether I would even get better reception with a dedicated airband (VHF+UHF) antenna rather than my discone. Any other thoughts on that?