Allow me [img]smile.gif[/img]
What race? That determines much of what you plan to do. Might I recommend a Dwarf, so you can use the Dwarven Thrower.
As for the cons, well, really, there are no cons. Excepting the fact you can't use bladed weapons. No big deal.
Now, for the pros.
Do you want a super tank? With killer THAC0, huge hit points, unstoppable to the point of being Godlike?
With spells like Rightious Magic, Armor of Faith, Chant, Bless, Defensive Harmony, etc, you can make a character that can really take a beating and ask for more. You can have a Fighter with 25 strength, and that's with out items. It is also possible to hit 25 constitution, if only for a short time. With the right spells you can can almost go to an auto-hit condition, each time doing maximum possible damage much like a Kensai can.
With 25 con, and, a little clerical spell called Regeneration, it is quite possible to heal up faster then an enemy can damage you. (Select items help as well.) Also, if you are a Dwarf, having 25 con will aid your saving throws considerably. (Dwarves get major bonuses every 3.5 con)
Spell use. Miscast Magic can ruin a mages day. All of the healing and buffs you can muster. Summon undead or pit fiends if that's your thing. As a Fighter, your THAC0 is actually good enough to use spells like Cause Critical Wounds, Slay Living, and Harm. Harm is a wonderful spell, use it on things you really don't want to spend much time fighting, like say, dragons or mages. It bypasses stoneskins and can make short work of most mages. If you were really good as a Cleric however, most mages would never get a chance to cast stoneskins unless they were in a contingency. Also, Greater Command is wonderful, but, beware, this will also nail your party members. Holy Smite is awesome, capable of doing much damage in a Cloudkill like area. Also, Doom and Finger of Death is down right cruel, capable of quickly putting an end to most disagreements. Try it on Dragons
Earthquake is good, but, you can easily kill your own party with the spell if you are not careful. Do a search on Priest of Talos and you will probably find an old post of mine where I lay out a whole lot more.
Remember, have fun and be careful. A well built Cleric might surprise you.
If you really want a wicked divine caster, try a Ranger Cleric. They get all of the Cleric's and Druid's spells. The game's engine is horribly broken in this aspect, but, they totally rip.