Well, short answer: I'd humbly suggest you try something like
this instead. (Sticking as close to your original layout as possible and within a million of your budget.)
Reasons?
Weapons:
If you want to take weapons out exploring, take energy weapons only - there's no spare ammo lying around. (If you can afford it, buy a turret for the large mount - it compensates for the DBE's less than stellar maneuverability.)
Utilities:
At least one heat sink, even though the DBE has excellent heat management. Why? You can't fight very well with it, and you can't run very fast, but you can always dump a heat sink, go silent running, and drift away.
PP:
B is a no-go for exploration (too heavy), if you don't want to strip her of weaponry (else, a 3A or 4D is enough), take the 4A.
Thrusters:
Same here, don't go B. A thrusters don't make a lot of difference with the DBE (well, they make a difference, but not one that makes it able to outturn or outrun a lot of threats), so D is enough for exploration.
Life Support:
Again, mass over quality: 25 minutes can be enough to safe you if you explore very close to the bubble, else it's not worth the trouble.
Power Distributor:
Take the 4A if you keep weapons and shields and still want to be ready for the occasional boost.
Sensors:
3D. 3 tons of mass saved for only 6,000 credits.
Fuel Scoop:
Go as big as you can afford. It makes a world of difference; if possible, get a 4A. Mass doesn't matter here, same with the AFMU.
In general:
If you can't run (highly possible), hide. It's not a fighter.