MWO, no question. If you are involved in PA design then I would recommend it. I also don't get involved in pricing but I was told not so long ago that MWO is cheaper than ADS. I think the standard EMSIGHT [on grid EM engine] is now part of the MWO package now [check this directly] and we got very accurate model versus measurement with that for <6GHz discrete PA designs. Although I wasn't involved in filter design directly, we also got very good suspended substrate design results well above 6GHz with EMSIGHT alone. If you want to upgrade to an off-grid solver then add AXIEM, which is very much like MOMENTUM in ADS. Like any tool though, these things are just calculators and whilst I don't dispute accuracy between the packages it really depends on the users ability at being able to develop models that are an accurate representation of the physical and also understanding the limits of those models which they construct. However, where MWO wins hands down is its ease of working with complex design tasks, specifically the load pull tools are a dream to use. I still cannot believe how poorly ADS has been thought out, specifically with respect to amplifier design, it suffers from a very outdated GUI / file / library system that is quite possibly the most frustrating thing I have ever encountered. Like MWO, you can customize ADS heavily for specific tasks but it comes at the expense of having to almost finish the CAE development job for them and you get bogged down with a very messy syntax system. I really don't want to have to write a few lines of equation to simply plot constant Q circles on a smith chart. Ultimately, I find ADS just gets in the way of my creativity and I feel more like a programmer than a designer for much of the time I work with it. I'm also not the first to raise these points. ADS..... You could learn tonnes from the MWO boys and girls.