A 30watt iron is on the low side.. personally I have gotten away with a decent 40watt iron from Sears/Craftsman.. best thing is that its only $10..

If you want higher temp solder, you can use the more eco-friendly "no-lead" solder, but its a pain to deal with. You will need a much higher temp iron. If you want a "better quality", look for what they call "silver solder". Costs a bit more than the typical rosin-core lead/tin solder too.. It looks shinier, but also takes a higher quality iron to heat it up the best. Silver solder also doesnt mix well with the lead/tin solder... so beware.

You would probably do better just getting a hotter iron with a good tip. I've done well with the Craftsman for a number of years.. tips are only $3 a set and they even take the iron back if the iron (not the tips) fails.

Jerome