what wide band in test

finished another ls 5.3 4l60e swap in a 84 c10 for a customer. I watched the video of using sd fuel trims to tune and iam with in 2% with cold air intake and headers with true duals no cats. seems to be within what you like to see but I did nothing to the tune but did away with vats and any error codes relative to cats or egr. Happy with performance but I want to be better.Should there be more tuning with these mods with a stock internal engine? what wide band are you using in these road test ? innovate lm2 has more bad reviews then good, iam using hp tuners and really iam wanting to get deeper into tuning more customers vehicles and would like a good quality portable wideband. iam working 7 days a week in shop to fund these tuning tools and willing to spend money for a good quality wideband. any info would be great thanks.