Which is more reliable and accurate with power adders(TST,Edge,Smarty) I like the analog for just it's simplicity and looks, but it seems like the digital gauges and chips together (edge juice/attitude) are cheaper. A buddy is getting ready to get one or the other, so your opinions might make his mind up. I suggested Smarty with triple isspro's, but there might be a better combo? It 's an 04. 5 with nv5600.