I guess there could be more suggestions if we knew what type of music you play, what 'sound' you are after, what Bass you have etc etc. If you want a dirty overdriven sound then the Markbass probably is not for you. Me I love my Markbass gear and the sound suits me fine. Others will suggest their GK gear which is equally valid.
I had a LMII and LMIII with a Traveller 210 cab and it was great, light, small and punched well above its weight. I now have a MB CMD121p which is even smaller. It's actually a better deal to buy a combo in that if you buy a LMIII it's around £400 new and a 210 cab is £370 for a Traveller or £430 for a standard cab so around about £800 in total. The equivalent combo is £700.