Here's the question tho. Are you planning on focusing melee, or more of a support character? You mentioned the PRC Soldier of Light, but I'm personally not familiar with that class.
If you're focusing on melee, more than likely you're not going to be spending rounds casting spells anyway, except perhaps one or two prior to combat. Instead you'll be in the thick of battle, unleashing flurry of blows. In that case, using and giving up a spellcasting progression isnt that big of a deal.
If you're want it to be more of a caster, you're melee attack abilities are'nt all that important anyway, and its the monk's mobility and defensive advantages that are your main concern.
Make this decisions before you chose a class to pair with.
If you're focusing on melee, more than likely you're not going to be spending rounds casting spells anyway, except perhaps one or two prior to combat. Instead you'll be in the thick of battle, unleashing flurry of blows. In that case, using and giving up a spellcasting progression isnt that big of a deal.
If you're want it to be more of a caster, you're melee attack abilities are'nt all that important anyway, and its the monk's mobility and defensive advantages that are your main concern.
Make this decisions before you chose a class to pair with.