The Metanium palms bigger than the Aldebaran and does not hold much more line. Especially the cheaper JDM version with a shallow spool (all other things exactly the same i believe). The Metanium is still very comfortable to palm in my hands. I have all fingers north of the trigger when palming. The Metanium MGL is the best casting reel I have fished. This includes older Zillions, Met 13, Met DC, Aldebaran 2015 and 2009 51 Mg7, Core 51 Mg7, Curado 51E and 201E7, Curado 71. More expensive options like the Antares (heavy), Conquest (round) and Steez may cast as well or better, i have never fished them.
The 2015 Aldebaran is the smallest and lightest reel I have used by far. Noticeable weight difference between it and a Magnesium Core 51 or Metanium MGL. Casts great. 2 bearings in each knob (Met MGL does too) but i swap the knobs for the larger MET 13 XG ones. It has the small knobs like the ones on the Curado 71. On a lightweight and balanced rod like the NRX 842 (fast action) or NRX 852 (XF) it makes a hard combo to put down.
Both the 842 and 852 lack a bit of power to be ideal for pitching typical skirted jigs 3/8oz plus plastic and greater to cover IMO. Better suited for 3/16oz jigs and t-rig, shakey jigs, weightless plastics, small paddletails, small squarebills. Perfect for a 4" senko and beginning to feel light with a 5" senko but totally doable if that helps.
For an all around jig rod for pitching id look at something sensitive, MH, XF or maybe F. some rods I have never used like the high end Kistlers (sensitive), Dobyns (balanced) and some of the high end Megabass rods where value starts to diminish rapidly might be worth some research. Different MB lines vary greatly in sensitivity, do your homework if you go this route. My MB experience is only with the XX line. Great sensitivity but not near NRX territory. Awesome tapers for moving baits.