My personal view is buy the cheapest 4 string that can do the trick. Then as you progress and improve, upgrade. But work your way from the bottom. Just like having a job, you just dont walk into the VP spot, you have to start entry. Think of it as paying your dues. True story: When i first started playing, I had a cheap little 4 string with a 30 watt amp, but i wasnt any good so it didnt matter. I would come play, and they would always make fun of my bass, and my stuff. Then as i got better, i got a 50 watt amp, and they still made fun, because my church plays loud. I wasnt playing for service at the time, i was just learning. Then as i got better, I got a cheap 5 string, and they still made fun of me. I didnt have a slap sound or anything, but I kept on practicing. Then as time went on, i bought a pre amp and i would plug it into a mixer than into a PA sspeaker and play out of it. Then I would play out of one of those homemade cabs which wasnt any good but it did the trick. Then as time went on i got a head, and i would play my head out of the other bass players speaker. Still practicing my slap technique but never got that sound. Then eventually through my faithfulness the Lord blessed me with my own SWR Goliath III, and i still had no slap sound, but i had my own rig. Then the Good Lord saw fit for someone to just give me an Ibanez SG405. Now i finally had a killer slap sound. THen as time went by, the Lord blessed me with an Eden head and i had a good sound going on. THe lord blessed me with a very nice sound. Then the Lord blessed me recently to be able to purchase my very own Ken Smith Black Tiger bass (still on order). And imagine what kind of sound that is going to bring out. The conclusion of the story, wait on the Lord and pay your dues. Scripture declares in Luke 16:10 "He that is FAITHFUL in that which is least is FAITHFUL also in much: and he that is unjust in the least is unjust also in much." Get small, and be faithful and the Lord will bless you with much.