Thanks for your response everyone,
Firstly I already have a very clean/true sounding bass head the m500 sounds like no other too my ears and I've used the usual ( mark bass , Genz Benz , ampeg and TC).
The barefaced cab is nice it's not the issue however just on a few points raised I would say the cab can sound boxy at times and have found this to be where the cab is placed in the room ( like any other bass cab). However to my ears it seems to be more obv with this.
Yes mostly my gigs are in tight spaces where my cab is at my knees and I am pretty much standing on it due to floor space so I know this may be an issue.
* Going back to the initial point in the post -
I'm looking for a cab as a spare and back up , no looking to outshine the BF cab looking for similar in terms of a one cab solution.